#let{
	float: left;
}
#ret{
	float: right;
}
#box{
	height: 50px;
	line-height: 50px;
	padding-left: 20px;
	padding-right: 20px;
}
#box::after{
	content: "";
	clear: both;
	display: block;
}
.col-md-10:first-child{
	background-color: #BFCBD9!important;
}